See all Attractions in Owatonna Owatonna for: Adventure, Food And Dining, Art And Culture, Nightlife, Spa, History, First Timers, Family, Romance, Shopping National Farmer's Bank of Owatonna Owatonna, MN, USA About National Farmer's Bank of Owatonna. Built in 1908 and designed by Louis Sullivan, this bank is a premier piece of the Prairie School of architecture. It is now operated as a branch of Wells Fargo. Add to Wish List